You all know I love me some berries, but it is for good reason!
Chronic exposure to calorie dense foods, typically in the form of a standard high-fat diet, causes metabolic stress effecting mitochondrial respiration and dissipation of the mitochondrial proton gradient in adipose tissue causing mitochondrial dysfunction. Previously we knew that anthocyanin-rich diets were beneficial for maintaining healthy body weight, improving glucose and lipid metabolism, and determining inflammatory status of key metabolic tissues. The anthocyanins, malvidin, petunidin, and peonidin (in berries) were found to improve body composition and enhance mitochondrial respiration and dissipation of the mitochondrial protein gradient when under chronic metabolic stress.
From the literature that we have, and our current understanding, Berries, especially concord grapes and black current help prevent some of the metabolic stress induced from chronic exposure to calorie-dense foods.
As always I love answering your questions! Attached are a few of the articles I used to make this post.
Disclaimer: All opinions are my own. I do not provide medical advice. If you have questions please ask your doctor & do your own research. I am still a medical student and a PhD candidate. I have 5 degrees including 2 masters in nutrition & metabolism. I am a certified personal trainer & have researched these topics for 9 years. The information I post is research based & is information not always taught in school